Troubleshooting Alarm Conditions; Module Alarm Conditions - Cisco Prisma II Installation And Operation Manual

Chapter 5 Maintenance and Troubleshooting

Troubleshooting Alarm Conditions

Module Alarm Conditions

If the red ALARM indicator is illuminated or is blinking, check the display on the
front panel to determine the cause of the alarm.
Alarm
Rx 1 Optical Input
Power
Rx 2 Optical Input
Power
PsOk
AGC 1 Range
Status
AGC 2 Range
Status
CAUTION:
Some 1310 nm transmitters with serial numbers beginning with NN are not
compatible with these receivers. Do not install these transmitters in any daisy
chain with one or more of these receivers.
104
Function Possible Causes
Optical input 1


Optical input 2


Bus voltage

status
AGC 1 out-of-

range alarm


AGC 2 out-of-

range alarm


Possible Solutions
Broken fiber

Transmitter failure

Broken fiber

Transmitter failure

Power supply

faulty
Broken fiber

Transmitter failure

Input power too

high or too low for
AGC setting
Broken fiber

Transmitter failure

Input power too

high or too low for
AGC setting
Check fiber
Transmitter failure
Check fiber
Transmitter failure
Check power supply
Check fiber
Transmitter failure
Adjust AGC
Check fiber
Transmitter failure
Adjust AGC
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